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PCI: imx6: Integrate new pwrctrl API

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Integrate the PCI pwrctrl framework into the pci-imx6 driver to provide
standardized power management for PCI devices.

Legacy regulator handling (vpcie-supply at controller level) is maintained
for backward compatibility with existing device trees. New device trees
should specify power supplies at the Root Port level to utilize the pwrctrl
framework.

Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260520084904.2424253-2-sherry.sun@oss.nxp.com
This commit is contained in:
Sherry Sun 2026-05-20 16:48:57 +08:00 committed by Manivannan Sadhasivam
parent 9dda3f83ba
commit 85c1fcfa74
2 changed files with 24 additions and 1 deletions
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1
drivers/pci/controller/dwc/Kconfig
View File

@ -114,6 +114,7 @@ config PCI_IMX6_HOST
depends on PCI_MSI
select PCIE_DW_HOST
select PCI_IMX6
select PCI_PWRCTRL_GENERIC
help
Enables support for the PCIe controller in the i.MX SoCs to
work in Root Complex mode. The PCI controller on i.MX is based

24
drivers/pci/controller/dwc/pci-imx6.c
View File

@ -20,6 +20,7 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/pci.h>
#include <linux/pci-pwrctrl.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
@ -1363,6 +1364,7 @@ static int imx_pcie_host_init(struct dw_pcie_rp *pp)
return ret;
}
/* Legacy regulator handling for DT backward compatibility. */
if (imx_pcie->vpcie) {
ret = regulator_enable(imx_pcie->vpcie);
if (ret) {
@ -1372,10 +1374,22 @@ static int imx_pcie_host_init(struct dw_pcie_rp *pp)
}
}
ret = pci_pwrctrl_create_devices(dev);
if (ret) {
dev_err(dev, "failed to create pwrctrl devices\n");
goto err_reg_disable;
}
ret = pci_pwrctrl_power_on_devices(dev);
if (ret) {
dev_err(dev, "failed to power on pwrctrl devices\n");
goto err_pwrctrl_destroy;
}
ret = imx_pcie_clk_enable(imx_pcie);
if (ret) {
dev_err(dev, "unable to enable pcie clocks: %d\n", ret);
goto err_reg_disable;
goto err_pwrctrl_power_off;
}
if (pp->bridge && imx_check_flag(imx_pcie, IMX_PCIE_FLAG_HAS_LUT)) {
@ -1437,6 +1451,11 @@ static int imx_pcie_host_init(struct dw_pcie_rp *pp)
phy_exit(imx_pcie->phy);
err_clk_disable:
imx_pcie_clk_disable(imx_pcie);
err_pwrctrl_power_off:
pci_pwrctrl_power_off_devices(dev);
err_pwrctrl_destroy:
if (ret != -EPROBE_DEFER)
pci_pwrctrl_destroy_devices(dev);
err_reg_disable:
if (imx_pcie->vpcie)
regulator_disable(imx_pcie->vpcie);
@ -1455,6 +1474,7 @@ static void imx_pcie_host_exit(struct dw_pcie_rp *pp)
}
imx_pcie_clk_disable(imx_pcie);
pci_pwrctrl_power_off_devices(pci->dev);
if (imx_pcie->vpcie)
regulator_disable(imx_pcie->vpcie);
}
@ -1966,6 +1986,8 @@ static void imx_pcie_shutdown(struct platform_device *pdev)
/* bring down link, so bootloader gets clean state in case of reboot */
imx_pcie_assert_core_reset(imx_pcie);
imx_pcie_assert_perst(imx_pcie, true);
pci_pwrctrl_power_off_devices(&pdev->dev);
pci_pwrctrl_destroy_devices(&pdev->dev);
}
static const struct imx_pcie_drvdata drvdata[] = {